|Cite this article as:|
|Hui-xiang Yu, De-xin Yang, Jia-ming Zhang, Guang-yuan Qiu, and Ni Zhang, Effect of Al content on the reaction between Fe-10Mn-xAl (x=0.035, 0.5, 1, 2 wt%) steel and CaO-SiO2-Al2O3-MgO slag, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2298-y|
The effect of Al content (0.035, 0.5, 1 and 2 wt%) on the composition change of steel and slag, as well as inclusion transformation of high manganese steel after equilibrated with CaO-SiO2-Al2O3-MgO slag was studied by method of slag/steel reaction. The experimental results show that, as the initial content of Al increased from 0.035% to 2%, Al gradually replaced Mn to react with SiO2 in slag to avoid the loss of Mn due to the reaction, which caused both Al2O3 in slag and Si in steel to increase, while SiO2 and MnO in slag to reduce. In addition, the type of inclusions also evolved as the initial Al content increased. The evolution route of inclusions was MnO→MnO-Al2O3-MgO→MgO→MnO-CaO-Al2O3-MgO and MnO-CaO-MgO. The shape of inclusions evolved from spherical to irregular, faceted, and finally transformed to spherical. The average size of inclusions presented a trend that was increasing first and then decreasing. The transformation mechanism of inclusions was explored. As the initial content of Al increased, Mg and Ca were reduced from top slag into molten steel in sequence, which consequently caused the transformation of inclusions.